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Leases (Percentage of Revenue) (Details) - United States Government - Concentration risk	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Lease Revenue From Continuing Operations, Risk Benchmark
Concentration Risk [Line Items]
Percentage of revenue	37.00%	36.00%	37.00%
Fixed Lease Revenue From Continuing Operations Benchmark
Concentration Risk [Line Items]
Percentage of revenue	27.00%	26.00%	27.00%

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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